33721966 has 8 divisors (see below), whose sum is σ = 50642640. Its totient is φ = 16841088.

The previous prime is 33721957. The next prime is 33721969. The reversal of 33721966 is 66912733.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×33721966² = 2274341981810312, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33721969) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7731 + ... + 11278.

It is an arithmetic number, because the mean of its divisors is an integer number (6330330).

Almost surely, 2^33721966 is an apocalyptic number.

33721966 is a deficient number, since it is larger than the sum of its proper divisors (16920674).

33721966 is a wasteful number, since it uses less digits than its factorization.

33721966 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19898.

The product of its digits is 40824, while the sum is 37.

The square root of 33721966 is about 5807.0617355079. The cubic root of 33721966 is about 323.0757010565.

The spelling of 33721966 in words is "thirty-three million, seven hundred twenty-one thousand, nine hundred sixty-six".